ILLINOIS PLANT INFORMATION NETWORK
 
 ILPIN INFORMATION ON    Ambrosia bidentata
 
 
 CLASS:    DICOTYLEDENAE
 ORDER:    ASTERALES
 FAMILY:   ASTERACEAE
 SCIENTIFIC NAME:  Ambrosia bidentata
 AUTHORITY:  Michx.
 
 COMMON NAMES:
    LANCELEAF RAGWEED
    SOUTHERN RAGWEED
 
 SYNONOMY:   None
 
 PLANTS CODE: AMBI2
 
 NATURAL COMMUNITIES:
     PRAIRIE
       TYPICAL PRAIRIE
         DRY
         DRY-MESIC
         MESIC
     WETLAND
       BORDER OF LAKE
     CULTURAL
       AGRICULTURAL FIELD
       SUCCESSIONAL FIELD
       DEVELOPED LAND
 
 
 SAF FOREST COVER TYPE:
     NO
 
 NATURAL DIVISION:  UNAVAILABLE
 
 COUNTIES:
   ADAMS           ALEXANDER       BOND            CHRISTIAN       CLARK
   CLAY            CLINTON         COLES           CRAWFORD        CUMBERLAND
   EDGAR           EDWARDS         EFFINGHAM       FAYETTE         FRANKLIN
   GALLATIN        GREENE          HAMILTON        HANCOCK         HARDIN
   JACKSON         JASPER          JEFFERSON       JERSEY          JOHNSON
   LAWRENCE        MCDONOUGH       MACOUPIN        MADISON         MARION
   MASSAC          MENARD          MONROE          MONTGOMERY      MOULTRIE
   PERRY           PIATT           PIKE            POPE            PULASKI
   RANDOLPH        RICHLAND        ST. CLAIR       SALINE          SANGAMON
   SHELBY          UNION           VERMILION       WABASH          WASHINGTON
   WAYNE           WHITE           WILLIAMSON
 
 GROWTH FORM:  Dicot-herb
 
 TAXONOMIC CHARACTERISTICS:
    LEAF ARRANGEMENT:   Alternate     Opposite
    LEAF TYPE:   Simple
    LEAF MARGIN:   Dentate
    LEAF VENATION:  Pinnate
    LEAF SHAPE:     Lanceolate   Ovate
    INFLORESCENCE:   Raceme  Spike  Head
    FLOWER MEROUS:  5
    FLOWER STRUCTURE:   Incomplete  (no sepals)
    FLOWER COLOR:   Yellow   Green
    FLOWER PLACEMENT:  Epigynous
    FRUIT:   Achene
 
 DISTINGUISHING CHARACTERISTIC COMMENTS:
     Leaves usually have a single pair of sharp, large teeth, one on each
     opposite leaf border, below the leaf middle. Whole plant is conspicuously
     hirsute.
 
 GEOGRAPHIC INFORMATION:
     ORIGIN:   Native
 
 POPULATION DYNAMICS:
     STATE STATUS: Not listed
     FEDERAL STATUS: Not listed
     COMMONNESS:  Common
     ENDEMIC:   NOT-ENDEMIC
 
 BIOLOGIC:
     HABIT:   Forb
     LIFE CYCLE:   Annual
     FLOWERING PERIOD:
         MONTH BEGINNING-      7         MONTH END-     10
     TROPHIC STATUS:  Autotrophic
     SEX:      Unisexual   -monoecious
 
 ECODISTRIBUTION COMMENTS:
     Waste ground, roadsides, along railroads.
 
 ENVIRONMENTAL RELATIONSHIPS:   No data entered
 
 FUNCTIONAL RELATIONSHIPS:
     MAJOR POLLINATION AGENT:   Wind
 
 HUMAN RELATIONSHIP DATA:
     ALLERGENIC:  Maybe
 
 
 WILDLIFE AND LIVESTOCK INFORMATION:
     FOOD VALUE:
         DEER VALUE:  Unknown
         UPLAND GAME VALUE:   -   Fruit
         WATERFOWL VALUE:  Unknown
         SMALL NON-GAME BIRD VALUE:  Unknown
         SMALL MAMMAL VALUE:  Unknown
         AQUATIC MAMMAL VALUE:  Unknown
         FISH VALUE:  Unknown
     COVER VALUE:  No data entered
 
 LIVESTOCK PALATABILITY DATA:  No data entered
 
 REVEGETATION PLANTINGS:
     WEEDINESS:   Economic
 
 
 
 REFERENCES:
Mohlenbrock, R. H., ed.  1975.  Guide to the vascular flora of Illinois.
     Southern Illinois University Press, Carbondale.  494 pp.
Steyermark, J. A.  1963.  Flora of Missouri.  Iowa State University Press, Ames.
     1725 pp.
Agricultural Experiment Station.  1981.  Weeds of the North Central States.
     Bulletin 772.  College of Agriculture, University of Illinois at Urbana-
     Champaign, Urbana.  303 pp.
Gleason, H. A.  1952.  The new Britton and Brown illustrated flora of the
     northeastern United States and adjacent Canada.  3 vols.  The New York
     Botanical Garden, New York.
Wodehouse, R. P.  1971.  Hayfever plants.  Hafner Publishing Company, New
     York.  280 pp.
 
 END OF DATA FOR SPECIES  Ambrosia bidentata
 
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 ILPIN was developed by Louis Iverson*, with data compiled by David Ketzner and Jeanne Karnes
 Illinois Natural History Survey, 607 E. Peabody Dr., Champaign, IL 61820
     *currently employed by USDA Forest Service, 359 Main Rd., Delaware, OH 43015